Laars® Combi Heat™ Residential Energy Saver
Gas Water Heater System
The Laars® Combi Heat™ Flammable Vapor Ignition Resistant Models Feature
(50 gallon model only):
■ Advanced Flame Arrestor—Flame arrestor is designed to prevent ignition of
flammable vapor outside of the water heater.
■ Resettable Thermal Switch—Proven and reliable bimetallic switch prevents
burner and pilot operation in case of ongoing flammable vapor burn inside of
the combustion chamber or restricted air flow.
■ Pedestal Base—Rugged and durable base allows easy transport and
positioning, and provides corrosion resistant contact with floor.
■ Maintenance Free—Regular cleaning of air inlet openings or flame arrestor is
not required under normal conditions.
■ Sight Window—Offers a view into the combustion chamber to observe the
operation of the pilot and burner.
■ Piezo Igniter—Easy and quick lighting of the pilot burner by push button.
Photo is of
LCH-504T10FBN
All Laars® Combi Heat™ Models Feature:
■ Heat Exchanger—Double wall 11⁄2" O.D. glass coated steel coil ensures
separation of potable water and heating fluid.
■ Low Heat Exchanger Head Loss—Up to 10 GPM flow, with less than 5 ft. of
head loss. Greatly reduces the required pump size for heat exchange.
■ Glass Lined Tank—LAARS Heating Systems water heater tanks are protected
from the corrosive effects of hot water by an exclusive ceramic porcelain-like
coating.
■ Fully Automatic Controls—Built-in energy cut-off switch prevents abnormally
high water temperature for extra safety. Built-in gas pressure regulation.
■ Steel Tank—Heavy gauge steel automatically formed, rolled and welded to
assure a continuous seam for glass lining.
■ Thermostatic Mixing Valve—Supplied with unit to help prevent injury due to
scalding.
■ Protective Aluminum Anode Rod—Provides added protection against
corrosion for long trouble-free service.
■ Flue Baffle—Designed to maximize the amount of heat absorbed in the lower
portion of tank. Reduces air movement in the heater during standby periods to
retard heat loss up the flue.
■ Factory Installed Sediment Reduction System—Cold water inlet sediment
reducing device. Helps prevent sediment build up in tank. Increases first hour
delivery of hot water while minimizing temperature build up at top of tank.
■ Water Connections—3⁄4" NPT factory installed true dielectric fittings. Extends
water heater life and eases installation.
■ 2" Non-CFC Foam Insulation—Surrounds the tank surface, saving energy by
retarding loss of heat.
■ T&P Relief Valve—Installed.
■ Brass Drain Valve.
■ Design Certified by CSA International (formerly AGA/CGA).
10-Year Limited Tank and Heat Exchanger Warranties / 6-Year Limited Warranty on Component Parts.
For products installed in USA, Canada and Puerto Rico. Some states and provinces do not allow limitations on warranties.
See complete copy of the warranty included with the heater.
MANUFACTURED UNDER ONE OR MORE OF THE FOLLOWING U.S. PATENTS: 7,063,133 B2; 5,954,492; 5,761,379; 5,943,984; 5,081,696; 5,988,117; 6,142,216; 5,199,385; 5,574,822; 5,372,185; 5,485,879;
5,277,171; (B1)5,341,770; 5,660,165; 5,596,952; 5,682,666; 4,904,428; 5,023,031; 5,000,893; 4,669,448; 4,829,983; 4,808,356; 5,115,767; 5,092,519; 5,052,346; 4,416,222; 4,628,184; 4,861,968; 4,672,919; Re.
34,534. OTHER U.S. AND FOREIGN PATENT APPLICATIONS PENDING. CURRENT CANADIAN PATENTS: 1,272,914; 1,280,043; 1,289,832; 2,045,862; 2,112,515; 2,108,186; 2,107,012; 2,092,105
Laars® Combi Heat™ Direct Fired Gas Water Heater System
Deluxe Energy Saver Models
Meet or exceed ASHRAE 90.1b (current standard) C.E.C. Listed
80% Recovery Efficiency
NATURAL GAS AND LIQUID PROPANE GAS
Model
Number
LP
Nat. Nat.
Nat.
U.S. Imp. BTU/Hr. BTU/Hr. U.S. Imp.
Gal. Gal. Input Input GPH GPH
LCH-504T10FBN
LCH-75T10BN
Model
Number
LCH-504T10FBN
LCH-75T10BN
45
72
A
B
Floor to Jacket
Flue
Dia.
LP
LP Conn.
U.S. Imp.
in.
in.
GPH GPH
Recovery
90°F Rise*
Capacity
38
61
70
81
65,000 61,000
76,000 76,000
66
81
59
70
Recovery
50°C Rise*
Capacity
59 1⁄4
63 3⁄4
55
70
Liters
Nat.
kW
Input
LP
kW
Input
Nat.
Liters/
Hour
LP
Liters/
Hour
170
272
19.1
22.3
17.9
22.3
265
317
250
317
22
26
A
B
Floor to Jacket
Flue
Dia.
Conn.
C
Vent
Dia.
in.
H
K Approx.
F
G
E
D
J
Floor
Floor
Floor
Floor to Floor
Top Depth Shipping
to
to
to
Weight
to
T&P
Water
Conn. Gas Exchanger Exchanger Top of Conn.
Inlet
Outlet Heater
Conn.
in.
in.
in.
in.
lbs.
in.
in.
in.
4
4
C
Vent
Dia.
mm.
mm.
mm.
1403
1530
559
660
102
102
50
53
13
16
277⁄8
307⁄8
50
53
563⁄8
601⁄4
57
611⁄4
241⁄2
281⁄2
238
328
K Approx.
H
G
F
E
D
J
Floor
Floor
Floor
Floor to Floor
Top Depth Shipping
to
to
to
Weight
to
T&P
Water
Conn. Gas Exchanger Exchanger Top of Conn.
Outlet Heater
Inlet
Conn.
mm. mm. mm.
mm.
mm.
kg.
mm. mm.
1270
1346
330
406
1505
1619
1505
1619
1432
1619
1447
1556
108
149
622
724
All Propane heaters are equipped with a cast iron burner. To order a Propane heater change suffix “BN” to “CX”.
*Based on manufacturers rated recovery efficiency.
C
Heat Exchanger
Head Loss
GPM
Ft. of
Hd. Loss
2
trace
5
0.4
8
2.3
10
4.6
12
6.9
K
B
D&G
A
LCH-504T10
Model Number
LCH-75T10
FBN
FCX
BN
CX
105
U.S. Gal.
.55
100
U.S. Gal.
.55
135
U.S. Gal.
.52
135
U.S. Gal.
.52
80.0
80.0
82.0
I
Water Heating❂
J
FHD
H
CAEF
Space Heating
CAAFUE%
F
E
Max. Heating
Capacity✦
55,000
BTU/Hr.
(16.1 kW)
82.0
55,000
BTU/Hr.
(16.1 kW)
❂ Based on ANSI Z-21.10.1 and 10.3 and DOE Test Methods.
✦ Based on ANSI/ASHRAE 124 Standard.
Actual values may vary based on circulator flow rate, number of zones,
water and space heating demands. Numbers subject to change.
Note: (C-DW2-75T will not have a pedestal base)
All natural gas models meet SCAQMD Requirements.
Meets NAECA Requirements
General
All gas water heaters are certified at 300 PSI test pressure (2068 kPa) and 150 PSI working pressure (1034 kPa). All potable water and heat exchanger
connections are 3⁄4" NPT (19mm) on 11" (203mm) centers. All gas connections 1⁄2" (13mm).
All models design certified by CSA International (formerly AGA/CGA), ANSI Z-21.10.1 and or 10.3 and peak performance rated.
Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement.
Suitable for Water (Potable) Heating and Space Heating
Toxic chemicals, such as those used for boiler treatment, shall NEVER be introduced into the potable water side. The potable side of this unit may NEVER
be connected to any existing heating system or component(s) previously used with a non-potable water heating appliance. The heat exchanger side of the
unit may be used in space heating applications.
800.900.9276 • Fax 800.559.1583 (Customer Service, Service Advisors)
20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130
www.Laars.com
Litho in U.S.A. © Laars Heating Systems 0806 Document 11020
F